[sdiy] Basic core designs of commercial analogs

[jhaible]

Merry Christmas to all of you!

I can't participate in these discussions as much as I'd want to right now,
but ...

>Jürgen is the promotor for the unscaled linear FM.

Really? Most circuits I've built have the FM amount scaled by the
keyboard CV. (Multiplying the expo converter's bias current
- = FM input - with the keyboard CV, just as practically everybody
else does.)
What I really recommend is the thru-zero FM (also "scaled"), because
this is where linear FM starts to sound interesting IMO. But I don't
have a circuit to do this glitch free, either.

JH.